When I saw the buttons on this remote, I obsessively had to know what they do. I found a manual for a similar model with the exact same button layout: Sony RM-PZ1SD. After using online translation tools and search, the top 9 buttons seem to be:

audio switch, display, power.
analog, digital, input.
BS, CS, 10-key.

(BS = broadcast satellite, CS = communications satellite.)

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Guy #4: The 10 button is also the 0 button. (It actually says “10/0″ on it.)

Anonymous #6: The top-left button (“audio switch”?), the 5 button, and the CH+ button have little raised dots on them so you can feel where they are.